Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S
The AirTAC SAIJ80X25-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 25 mm stroke that can be fine-tuned backward by up to 20 mm, yielding a highly precise 5 to 25 mm usable travel window. Delivering 2268 N of pull force at 0.5 MPa, it integrates a PT tapered G3/8 port and a robust 25 mm carbon steel rod threaded M20x1.5.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance in humid or mildly chemically exposed settings. The integrated -S magnet allows seamless position sensing with AirTAC CMSE reed and DMSE electronic switches fitted into the dual-side sensor grooves. The rear adjuster functions strictly as a travel stop for end-position tuning and does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S Is Used
Short-Stroke End Tuning
Dial in the exact 5 to 25 mm retract distance during machine commissioning to accommodate varying material thicknesses without replacing the cylinder.
Product Changeover
Quickly adjust the rear stopper when switching a production line to a new product size, ensuring precise positioning without external mechanical stops.
Corrosive Clamping Operations
Leverage the 2268 N pull force and SUS420J2 stainless steel rod for reliable clamping in environments with high humidity or mild chemical exposure.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S the Right Cylinder?
Selecting this 80 mm bore model is ideal when your application requires the 2268 N pull force at 0.5 MPa but demands strict end-position tuning without swapping physical cylinders during machine setup. The adjustable 5 to 25 mm travel window allows operators to dial in the exact retract distance on the fly. If your process requires holding a load securely without continuous air pressure, this cylinder is insufficient; you should instead evaluate the SAIL (air-released lock) or BSAI (clamp-lock) variants, as the SAIJ rear adjuster is a stop, not a brake.
For an ISO 15552 replacement match, ensure your specifications call out an 80 mm bore, 25 mm nominal stroke, 20 mm adjustment range, PT G3/8 port thread, and a magnet for sensors. The SAIJ mounting hardware utilizes a reduced subset of standard interfaces (Basic, FA, LB, TC, FTC, TCM1, TCM2) and intentionally omits FB, CA, CB, and CR mounts. Because the 25 mm stroke is extremely short, external side-load guides are generally unnecessary, but the 25 mm rod diameter handles off-center loads effectively if minor misalignment exists.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX25-20S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N. The operational speed range is 30 to 800 mm/s.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 25 mm down to a minimum of 5 mm, creating a 5 to 25 mm usable travel window. It only sets the end position and does not hold the load without live air pressure.
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